Car brake



R. N. COATS CAR BRAKE pr. 17, 1923. IASLQZ Filed Aug. l0 1922 gnvenfof@MMI Patented Apr. 17, 1923.

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ROY N. COATS, OF BENTON, WASHINGTON, AssIGNoR To PACIFIC GAR AND FOUNDRYCOMPANY, OF sifiA'r'TLE, WASHINGTON; A CORPORATION or WASHINGTON.

OAR BRAKE appiieo med August 1o, ma seria-u No. 580340.

To all whomz't may concer/n Be it known that I, ROY' N. CoATs acitizen'of the United States of America, and resident of the ycity ofRenton, in the county of King andStat'e of lllashington, have inventedVcertain new and usefnlIrnprovements' in GarBfakes, of which the'following is a speciiicationf. My'invention relates' to a brakeoperating, r'reansI for use upon railway cars.

Onej of the objects of myv invention isV to provideY ya ratchet niansforA operating a brake in which the ratchet dog is normallydisengagedvvhennot active* use. and in ivhich the ratchet dog V'willautomatically rewhen moved into the p ostien `of use. i A further'objectv is' to provide automatic inea-ns for releasing such'` ratchetdog While in position'of use.

'I A further object is' tok provide 'Ineans preventing such *release ofthe ratchet dog:r Whilein position of'u'se except as the holding dog' isreleased.

. Another objectisto providela ratchety dog which is gravit'yiactuatedlto engage or' to disengagethe ratchet' Wheel',` 'and' controlledbyfnaipulatinofthe operatingr yhand-1e;

A further Objectis the provision of a simple and convenient "brakeof thecharaeter described" and* one which' is; simpley in operation. l a istill furtherobjectis the provision of a conveniently 'assembled and*attached bracketlfor usel` in connectionV with such a brake operatingmeans inventionfc'ornpri'ses those novel parts and combinations thereofVWhich are shown in thel accompany/'ing drawings; described in thespecilication, and particularly defined bythe clainis terininating thesame.

In the accoinl)anying drawings I have shown inyf invention in the formwhich is now'preferredbr mehr@ Jfiisi there@ op rating-mechanism sho nin normaipostion; vvrfhen"not inf actii'fe-` use Figure? Sa S mechanism'l"shown 1n releasing position',

. WhileV active "usejI d b rale '1i of any lsuitable" construction", is'mounted upon the car, oras shown unit may be placed upon 'or removedfrom the car. This bracket in ay be of any suitable construction,` thepreferred construction, however, being described hereinafter.

Upon the brake staffl is secured a ratchet Wheel 3. Also pivotallyrsecured uponthe brake staff 1 to rota-te relativethereto is a handle4f, Ordinarily thislhandle ,\vhe1i not in active use, will hang;bygravity in the position 'shown by dotted lines rin Figure 2. AholdingV4 dogl 5 is pivoted upon the bracket 20, preferably t one sideolf ayertica-l'plane passing through the aiiis of the brake staff 1. e

A ratchet dog is provided for the ratchet Wheel V8. Preferably vthis ispivot'ed' the' handle e, and in the embodiment shoivn in theaccompanying drawingsthis is show-n as a lever 6 pivoted between' itsends. O ne end 63 forrns `tl ie ratchet dog While the opposite end I62functions as a dog-releasing arm in cooperation' with the cani stop 2.Asshown itlia's a curved upper surfacen not concentric- With the ratchetwheel 3 and `eX- tendible under the 'cani 2. The lever Gris weighted,the Weight 61 being'` so positioned that when the handle 4f is in itslnormal in operative position' 'the Weight 6l will hang` down' todisengage the? ratchet dog,r 63 from theratchetwheel 3. It will seenthenthat iipon movement of the handle tothe right from the position shown inFigiu'Z, thewweight 61 will causethe 1/'atch,et dog 63 'toeng'age the'teeth of ,the ratchet Wheel Movement to the left/thereafter ivill ro'-tate the brake staff l'. `ln this. manner the` Weight V61 effectsjbothengagement and dis'- engagement of the ratchet dog With the ratchetWheel 3, by proper manipulation of theA handlev Ll.

I provide: means whereby the dog 63 may befthrovvnb'ut of operativeposition While thehandle ireniains in operative'positioi.

Thieme-ans I have gramas@ @top jojr, Clam 1 2`W'hicliis inclined;andjvhich; projectsiiiit'o the path of'fthe arrri` 62 of' levend.engagement of thecair Qand theflarni the lever is rocked on itspivotandthedogfh?) loo is disengaged a'sisslioWr-i iii Figiiire'Q Pref'-e'rably this" cani surface 2 isT located irniriedil ately above thenorrnal inoperative position of the handle 451 f'orby siiclrlocatiolrfitis possible toY cause engagement thel V6,3

aae-eebsajueafiy as; disengagement bailarf than 180 movement of thehandle 4; that is, by slight movement from the normal engaging position.

The normal operative position of the holding dog 5 is shown in dottedlines in Figure 2. It will be noted that when the holding dog 5 is inthis position the arm 62 when moved in the direction to release the dog63 will contact with the holding dog 5 prior to its release by the cam2. In fact, the cam 2 and holding dog 5 may be so positioned relativelythat no release action of the ratchet dog` 62 will occur prior toengagement of the arm 62 with the holding dog 5. Inasmuch as the dog 5prevents automatic release of the ratchet dog 63 by means of the cam 2,

it follows that such release cannot occur eX cept when the holding dog 5is released. Such release oit the ratchet dog 63 would only be desiredWhen it is the intention to release the brakes, consequently this actionof the holding dog 5 prevents accidental release ofthe brakes during theoperation of setting them.

The cam 2 is shown as part of a cam plate 23 which is securedto andforms an eXtension iittedupon the bracket 20. The bracket 20 isconveniently formed of a strap 21 bent in U-shape, and containing theouter bearing oi the brake staff 1, and a channel bar 22to which theends of the strap 21 are secured, and Which channel bar forms the innerbearing for the brake staii 1 and the means by which the bracket issecured to the car. The cam plate 23 has a hook 24 at one end, Whichengages beneath an edge of the strap 21, and its opposite end is securedby a single bolt 25 passing therethrough and through the strap 21. Thismakes for easy replacement of the single cam plate, instead oi an entirebracket, in case of damage thereto. y

What I claim as my invention is:

l. In a car brake operating means, in combination, a brake staif, -aratchet Wheel secured thereon, a holding dog, an operating Ihandlepivoted concentrically with said ratchet Wheel and when not in usehanging by gravity in inoperative position, a Weighted ratchet dogpivotally secured upon said handle` and adapted to be disengaged fromthe ratchet Wheel by gravity When the handle hangs in inoperativeposition, and to be automatically engaged with the ratchet Wheel Whenthe handle is raised, and means for disengaging the ratchet dog from theratchet Wheel operable by further raising the handle.

2.l In a car brake operating means, in combination, a horizontal brakestai, a ratchet Wheel secured thereon, a holding dog positioned at oneside thereof, an operating handle pivoted concentrically with theratchet Wheel'and when not in use hanging by 'gravity in verticalposition, a Weighted ratchet dog pivotally secured upon said handle, andadapted to be automatically engaged by gravity With the ratchet WheelWhen the handle is raised, and to be dis engaged therefrom by gravitywhen the handle hangs in inoperative position, and a cam fixed abovesaid ratchet Wheel and enM gageable by the ratchet dog to release thelatter upon raising the handle to an extreme upper' position.

3. In a car brake operating means, in combination, a brake staff, aratchet Wheel sccured thereon, a releasable holding dog, an operatinghandle pivoted concentrically with the ratchet Wheel, a ratchet dogengageable With saidratchet Wheel, and a cam engageable by vsaid ratchetdog to release the latter, said holding dog and cam being so positionedrelatively that movement of the handle in a direction to release theratchet dog is interrupted, prior to its release, by the holding dogwhen the latter is inoperative position.

4. In a car brake operating means, in combination, a brake staff, aratchet Wheel secured thereon, a releasalole holding dog, an operatinghandle pivoted concentrically with the ratchet Wheel, a lever pivotedbetween its ends upon said handle, one vend thereof forming a ratchetdog, and a cam engageable by the opposite end of said lever. to releasethe ratchet dog, said cam and holding dog being so positioned relativelythat movement of the handle in a direction to release the ratchet dog`is interrupted by contact of the camengaging end of the lever and theholding dog prior to engagement of such end and the cam, andWhile theholding dog remains in operative position. y

' 5. In a car brake operating means, in combination, a brake stati', aratchet Wheel secured thereon, a holding dog, an operating handlepivoted concentrically With the ratchet Wheel, and when not in usehanging down by gravity,alever pivoted between its ends, one end forminga ratchet dog, and a Weight extending from the pivot center of saidlever approximately at right angles to its general direction and adaptedto release said ratchet dog by gravity When the handle is in position ofdisuse, and to cause its engagement with the ratchet Wheel When thehandle is moved towards operative position.

6. In a brake operating means, in combination, a brake staff, a channelbar having a bearing for one end thereof, a ill-shaped strap secured tothe flanges of said channel bar, and having a complemental bearing forthe brake staff, a ratchet Wheel secured upon said brake staff, aholding dog therefor, a handle pivotally secured upon the 1 brakestati', a ratchet dog carried thereby and engageable with the ratchetWheel, and means for automatically releasing the ratchet dog.

.7. In a brake operating rr'lenrls,"'in conf;-A

bination, a brake staff bracket comprising a channel bar and a strap ofU-shape secured vto the flanges thereof, a brake staff havinga bearingin each of said channel bar and strap, and extending outwardly ot thelatter, a ratchet wheel secured upon such outward extension of thestaff, a handle pivotally secured upon such outward extension outwardlyof -the ratchet wheel, a ratchet dog carried thereby and engageable withthe ratchet wheel, a holding dog, a cam plate having a hook engageableunder an edge of said strap and adapted to be secured thereto by a bolt,and having a cam surface extending beyond the end of said strap intoposition to engage said ratchet dog to release it.

8. In a car brake operating mechanism, a ratchet Wheel, a holding dog,an operating arm, a ratchet dog carried by said arm, a tappet campositioned to release said dog at the extreme backward movement of saidarm, said holdingr dog and cam being positioned to prevent engagement ofthe ratchet dog with the cam when the holding dog is in holdingposition.

9. In a car brake operating mechanism, a ratchet wheel, a holding dog,an operating arm, a ratchet dog carried by said arm, a tappet campositioned to release said dog at the extreme backward movement of saidarm, said holding dog and cam being positioned to prevent engagement ofthe ratchet dog with the cam when the holdingdog is in holding position,and automatically operating means for holding the ratchet dog in releaseposition when the operating arm is in depending position and to hold itin engaging position when the operating arm is thrown upward.

Signed at Renton7 King County, Vashington, this 19th day of July 1922.

ROY N. COATS.

